package object;

public class IntegerDemo {
    public static void main (String[]args){
        Integer i1=new Integer(5);
        Integer i2=new Integer(5);
        System.out.println(i1==i2);
        System.out.println(i1.equals(i2));

        Integer i3 =  Integer.valueOf(5);
        Integer i4 =  Integer.valueOf(5);
        System.out.println(i3==i4);
        System.out.println(i3.equals(i4));

        Integer i =5;
        int j=i;

        int max= Integer.MAX_VALUE;
        int min=Integer.MIN_VALUE;
        System.out.println("int的最大值为:"+max+"最小值为:"+min);
        long max1=Long.MAX_VALUE;
        long min1=Long.MAX_VALUE;
        System.out.println("long的最大值为:"+max1+"最小值为:"+min1);



        String s1="50";
        int age=Integer.parseInt(s1);
        System.out.println(age);

        String s2="123.456";
        double price=Double.parseDouble(s2);
        System.out.println(price);

    }

}
